For marine biologist Keegan Fanning, the grief of losing her grandparents is too painful to bear. As if battling her own demons is not enough, she discovers that saving a total stranger from committing suicide forges an unlikely bond that will bring them together in ways they could never imagine--a bond of trust and love that is quickly put to the test at the hand of a psychotic killer who has them in his sights--one who won't let up until he's exacted his revenge.